Method of forming cable.



RR. MQBERTY. METHOD OF FORMING CABLE.

APPLIOATION'PILED AUG-.9, 1909 Patented May 20, 1913..

2 sums-sum! 1.

F. R. MoBE-RTY. METHOD OF FORMING GABLB. APPLIOATION numme; 9; 1909'.

Patented May 20, 1913.

2 sums-sum 2.

W/fnesses V ED STATES, r

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FRANK R. McBERT'Y, OF NEW ROCHELLE, NEW YORK, ASSIGNOR T0- WESTERN ELEC TRIO COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METHOD OF FORMING CABLE.

Specification of Letters Patent. Patented lliay 20, 1913.

Application filed August 9, 1909. Serial No. 511,984.

To all whome't may concern:

Beit known that LFRANK R. McBER'rY, a citizen of the United States, residing at New Rochelle, in the county of \Vestchester and State of New York, have inventeda certain new and useful Improvement inv Methods of" Forming Cables, of which the following is a full, clear, concise, and exact description.

This invention relates-to a I method of forming cable of the type which is described. and claimed in my application Serial-No. 418*,121, filed February 27,- 1908. .This cable is in the form, of a flat woven ribbon, which comprises a warp of bare wires and a woof of insulating thread, the. wires being exposed at intervals to allow electrical pattern or row, so as to'permit the wires to be soldered directly to corresponding terminals of a selector or other device to be connected. The bare, spots or places where a wire is exposed preferably extend in a row diagonally across the cable, making the different wires successively available for connection, the cable being preferably folded along the diagonal row to fitover a row of terminals.

The method of weaving by which this structure is produced is as follows: The bare wires are assembled in parallel to form the warp of the ribbon, and an insulating thread is interwoven transversely therewith, forming aplain filling or woof, until the wires are to be exposed, whereupon two threads are used, said threads being passed alternately from each side of the ribbon, each thread embracing in its loop only those warp wires between the edge of the ribbon and the particular point where a wire is to be exposed, each. thread of course passingalternately over and under the Warp wiresembraced in its loop. At successive intervals the loops made by one of the threads may be progressively increased toembrace a greater number of warp wires, while the decreased, so that each of the Wires in turn may be exposed.

The invention will be more readily understood by reference to the accompanying drawings, in which- Figure 1 shows on an- 'enlarged scale a portion of cable during the process of weaving. Fig. 2 is a cross-sectional view on line -2 of Fig. 1. Fig. 3 is a rear of a completed length of cable, on a smaller scale. Fig. 4; shows such a length of cable with the two portions laterally displaced or opened out along the'line of bare spots. Fig. 5 shows the cable folded upon itself along the lines of bare spots and at intermediate points to adapt it for connection to rows of terminals. Fig. 6 is a side view of two groups of terminals connected by such folded woven cables, and Fig; 7 is aview taken at right angles to Fig. 6.

The same reference characters are used to indicate the-same parts wherever they are shown.

The cable aconsists-of a ribbon of wires or conductors b bound together and at the same time electrically insulated from each other and from other objects by means of insulating thread a woven about the con 40 mercerized cotton being suitable for ins'ulating the No. 28 copper ire. In weaving the cable, a double shuttle loom may be used, with a jacquard attachmentby which the particular warp wires to be included in each pick or passage of the shuttle may be automatically determined.

In weaving the plain woof or filling, only a single shuttle need be employed toccarry a single thread back and forth, across the Whole group of warp wires; but when tke pattern is to be woven, that is, when t different wires are to be successively left bare for short distances, two shuttles are used, forming loops which embrace onlythe Warp wires from theedge of the ribbon up to.the particular point to be left bare, the wires upon one side of this point lieing embraced by the thread 0' carried by one of the shuttles, whilethej wires upon the'other side are embraced by the thread 0 carried thg othernshuttle" 'the.i.wixie baredthereafter,

to be left bare at a particular place Z2 is not at that place embraced in the loops of either thread and is thus actually left bare in thein the operaweaving. To accomplish this, 'tion of the 100-111, the various wires formlng the warp are one after another oniitted' included in the woof woven byione thread or the other. In this-case, no portions of the wires areleft bare in the fabric as it comes from the loom, but the wires may-be two portions of'the woof meet, by pushing back thewoof on both sides of the dividing line between the portionwoven by one shuttle and the portion woven by the other. Or, if desired, the fabric may be so woven that portions are left bare as described-on one wire after another, while between the bare portion of one wire and the bareportion of the next, both shuttles carry their threads across the entire width of the ribbon, thus bindingthetwo portions of the woof to,- gether and from being closed upby the spreading of the threads. i

After a predetermined number of loops,

have been formed from the edges of the r1 bon to the point to be left bare, that is, after a predetermined length of ribbon has been woven by such loops from the opposite sides, respectively, of the ribbon up to the wire to be left bare, the warp wires are altered in position, as by the jacquard attachment on the loom, to bring a greater number of said wireswithin the loops formed by one thread and a less number of said wires within the loops formed-by the other thread, and the weaving is continued on this basis fora predetermined number of picks, or until a sulficient length of cable has the bare spot located at the point so determined, whereupon the position ofthe warp wires is again altered. The weaving is thus continued, the loops made by one of the threads being progressively increased in scope at successive intervals to embrace a greater number of warp wires, while the loops made by the other thread from theopposite'side qf the ribbon are correspondvnigly decreasedfln scope to embrace a less number of warp wi'res, thus-at regular intervals displacing 'themectin'g line of the two portions toward one side a distance equal to the lateral distance from any wire to the next, until. all the wires or as many as are to be ieft bare) have been passed. After the length of cable has been woven in which the wires have successively'been left other shuttle,

at the places where the the insulating preventing the bare portions been woven with bare at spots whichform a row diagonally across the ribbon, onehof the shuttles is stopped and the weaving continued by the given scope, and should be such that the bare spots, on adjacent wires are 'spaced" apart a di stance'corresponding tothes ac ing of the terminals to which the cable is to I be connected. In forming the woven cable for connect-Ion with a row of tern11nals,-the two sections on opposite sides of the line of bare spots are preferably displacedlaterally so as'tobend the baredportions of all the wires an larly-with respect to their normal direction and substantially at rightian'gles to; the row which embraces all the wires in its' successive loops and so forms a coniplete'plain filling until the pattern is again to i of bared'porof bare spots, the cable thenappearmg as in Fig. 4. This operation not only opens out the cable for connection, but also forces back woof and holds it in place at. the ends of the bare.

sists in" folding the line of bare causes the bared portions of the wires to a pear as projecting loops WhlCh may be laid the cable upon, itself along over the corresponding terminals'and' soldefied directly thereto, as shown in Figs. 6 an 7.

What is claimed is: '1. The process of making ribbon cable which consists in weaving two separate woof-portions upon a warp of parallel wires, and progressively increasing the width of-one woof portion while correspondingly decreasing the width of the other woof portion, whereby the dilferent wires one after another are-accessible for electrical connections at points located along the diagonal line of meeting of the two woof-portions.

- 2. The process of making ribbon cable which consists in interweaving two threads across .a warp of parallel wires, passing said threads alternately from each side of the ribbon over and under thev warp wires up to a predetermined intermediate wire and back again, said intermediate wire not being embraced at this point by the loops of either of said threads, whereby it is left exposed for electrical connection therewith.

3. The process of making ribbon cable 'which consists in interweaving two threads F across a warp of parallel wires, passing said portions. The next operation in the forming process, which conspots, as shown in Fig. 5,

respectively, and said intermediate point, an progressively increasing, at successive intervals, thescope of the loops fromone side of the ribbon while correspondingly decreasing the vscope of the loops from the other sidethei'eof.

4. The plpcess of making ribbon cable v which cons sts in interweaving" insulating thread with a warp of parallel are-Wires, and'varying the travel ofthewoof threadto progressively omit all of the wires one after v another forv short intervals, to leave por "ons of said wires I exposed for electrical connections.

woof portions-upon a warp of parallel'wires, progressively increasing the width of one woof portion While correspondingly decreasing the width of the other woof portion, and in such interweaving omitting the different wires one after another for short intervals 5. The process of making ribbon cable which consists 1n interweaving two separate tween the woof portions.

6. The process of'making ribbon cable" whereby each'wire, in turn, will be exposed for a short distance, the exposed portions forming aline which extends diagonally across theface of the ribbon.

In witness whereof, I hereunto subscribe my'name this sixth day of August, AL D.,

FRANK R. MoBERTY. Witnesses: F. T. WOODWARD,

EDGAR F.- BEAUnIEN.

to leave. portions of said wires exposed be- 

